QUANTUM SPACETIME: The quantum structure of spacetime and the geometric nature of fundamental interactions

• Unité de recherche: PCRD EU
• Numéro de projet: 99.0862
• Titre du projet anglais: QUANTUM SPACETIME: The quantum structure of spacetime and the geometric nature of fundamental interactions

Mots-clé (Anglais)

String theory; supersymmetry; supergravity; unified theories of particle interactions

Autre Numéro de projet (Anglais)

EU project number: HPRN-2000-00131

Programme de recherche (Anglais)

EU-programme: 5. Frame Research Programme - 4.1.1 Research training networks

Description succincte (Anglais)

See abstract

Partenaires et organisations internationales (Anglais)

Coordinator: Koninglijke Universiteit Leuven (B)

Résumé des résultats (Abstract) (Anglais)

Branes with fluxes :
The deformation of purely geometrical backgrounds of M-theory by fluxes can be studied using eight-dimensional gauged supergravity. Hernandez and Sfetsos (Patras Univ.) have shown that the most general solution describing D6-branes wrapped on Kähler four-cycles taken to be the product of two-spheres of different radii can be lifted to M-theory compactified on a Calabi-Yau fourfold. As a four-form flux representing a set of D2-branes along the flat directions is turned on, the geometry is deformed to a direct product of four-dimensional anti-de Sitter space with the Einstein-Sasakian seven manifold G1,1,1.
Branes wrapped on supersymmetric cycles :
D6-branes lift to pure geometry in eleven dimensions. This indicates that compactifications of M-theory on manifolds with reduced holonomy arise as the local eleven-dimensional description of D6-branes wrapped on supersymmetric cycles in manifolds of lower dimension with a different holonomy group. R. Hernandez and K. Sfetsos (Patras Univ.) have developed a systematic approach to manifolds of G2 holonomy with an SU(2)XSU(2) isometry, using maximal eight-dimensional gauged supergravity to describe D6-branes wrapped on deformed special Lagrangan three-spheres.

Références bases de données (Anglais)

Swiss Database: Euro-DB of the
State Secretariat for Education and Research
Hallwylstrasse 4
CH-3003 Berne, Switzerland
Tel. [phone]
Swiss Project-Number: 99.0862